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This little fellow measured only 1.6 mm. What a round head, and what a very distinct neck. I know the picture is not the best; hard to see the rear of the wings, for example.

What family?

Resting on a squash leaf, open area near woodlands, West Virginia USA, 5 August 2006.

Thanks for any help you can provide!

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Hello, Stephen!

I may be wrong, but I think that critter does not belong into Diptera but into Hymenoptera. Some kind of parasitic wasp (?).

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Hi Stephen,

I think J?rgen is right!

Jan Willem

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I am thinking of Diapriidae.

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Tiny size, paddle-shaped fringed wings with very reduced venation, jizz suggest Mymaridae a family erected by our (Ireland) countryman Alexander Henry Haliday:p:p. as a possibility (no time to check now) but Paul may well be right.
Robert
In the meantime take a look at http://hymenoptera.tamu.edu/keys/?taxcpl=cpl&taxcpl_id=1 which keys some reduced venation Hymenoptera

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Paul was right :p:p Diapriidae Nice mid 19th century plates family description at http://delta-intkey.com/britin/hym/www/diapriid.htm

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The antennal implants are too close together for Mymaridae and the shape of the antennal segments is also off. ;)

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Couldn't put it better myself. Maybe next we should start Hymen.info;)

Robert

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Juergen, Jan, Paul, Robert, I am impressed, you not only do Diptera but Hymenoptera as well. Thanks for setting me straight on this one. While I can no longer say this is the tiniest Dipteran I have ever photographed, it is nevertheless the tiniest wasp. Thanks again!

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Yes, it is my family Diapriidae, Trichopria sp.:)

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Hence your avatar. :)

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Wow, genus too, thank-you Proctoss.